package events

import (
	"encoding/json"
	"time"

	"tyapi-server/internal/domains/finance/value_objects"

	"github.com/google/uuid"
	"github.com/shopspring/decimal"
)

// BaseEvent 基础事件结构
type BaseEvent struct {
	ID            string            `json:"id"`
	Type          string            `json:"type"`
	Version       string            `json:"version"`
	Timestamp     time.Time         `json:"timestamp"`
	Source        string            `json:"source"`
	AggregateID   string            `json:"aggregate_id"`
	AggregateType string            `json:"aggregate_type"`
	Metadata      map[string]interface{} `json:"metadata"`
}

// NewBaseEvent 创建基础事件
func NewBaseEvent(eventType, aggregateID, aggregateType string) BaseEvent {
	return BaseEvent{
		ID:            uuid.New().String(),
		Type:          eventType,
		Version:       "1.0",
		Timestamp:     time.Now(),
		Source:        "finance-domain",
		AggregateID:   aggregateID,
		AggregateType: aggregateType,
		Metadata:      make(map[string]interface{}),
	}
}

// GetID 获取事件ID
func (e BaseEvent) GetID() string {
	return e.ID
}

// GetType 获取事件类型
func (e BaseEvent) GetType() string {
	return e.Type
}

// GetVersion 获取事件版本
func (e BaseEvent) GetVersion() string {
	return e.Version
}

// GetTimestamp 获取事件时间戳
func (e BaseEvent) GetTimestamp() time.Time {
	return e.Timestamp
}

// GetSource 获取事件来源
func (e BaseEvent) GetSource() string {
	return e.Source
}

// GetAggregateID 获取聚合根ID
func (e BaseEvent) GetAggregateID() string {
	return e.AggregateID
}

// GetAggregateType 获取聚合根类型
func (e BaseEvent) GetAggregateType() string {
	return e.AggregateType
}

// GetMetadata 获取事件元数据
func (e BaseEvent) GetMetadata() map[string]interface{} {
	return e.Metadata
}

// Marshal 序列化事件
func (e BaseEvent) Marshal() ([]byte, error) {
	return json.Marshal(e)
}

// Unmarshal 反序列化事件
func (e BaseEvent) Unmarshal(data []byte) error {
	return json.Unmarshal(data, e)
}

// InvoiceApplicationCreatedEvent 发票申请创建事件
type InvoiceApplicationCreatedEvent struct {
	BaseEvent
	ApplicationID string                    `json:"application_id"`
	UserID        string                    `json:"user_id"`
	InvoiceType   value_objects.InvoiceType `json:"invoice_type"`
	Amount        decimal.Decimal           `json:"amount"`
	CompanyName   string                    `json:"company_name"`
	ReceivingEmail string                   `json:"receiving_email"`
	CreatedAt     time.Time                 `json:"created_at"`
}

// NewInvoiceApplicationCreatedEvent 创建发票申请创建事件
func NewInvoiceApplicationCreatedEvent(applicationID, userID string, invoiceType value_objects.InvoiceType, amount decimal.Decimal, companyName, receivingEmail string) *InvoiceApplicationCreatedEvent {
	event := &InvoiceApplicationCreatedEvent{
		BaseEvent:     NewBaseEvent("InvoiceApplicationCreated", applicationID, "InvoiceApplication"),
		ApplicationID: applicationID,
		UserID:        userID,
		InvoiceType:   invoiceType,
		Amount:        amount,
		CompanyName:   companyName,
		ReceivingEmail: receivingEmail,
		CreatedAt:     time.Now(),
	}
	return event
}

// GetPayload 获取事件载荷
func (e *InvoiceApplicationCreatedEvent) GetPayload() interface{} {
	return e
}

// InvoiceApplicationApprovedEvent 发票申请通过事件
type InvoiceApplicationApprovedEvent struct {
	BaseEvent
	ApplicationID string `json:"application_id"`
	UserID        string `json:"user_id"`
	Amount        decimal.Decimal `json:"amount"`
	ReceivingEmail string `json:"receiving_email"`
	ApprovedAt    time.Time `json:"approved_at"`
}

// NewInvoiceApplicationApprovedEvent 创建发票申请通过事件
func NewInvoiceApplicationApprovedEvent(applicationID, userID string, amount decimal.Decimal, receivingEmail string) *InvoiceApplicationApprovedEvent {
	event := &InvoiceApplicationApprovedEvent{
		BaseEvent:     NewBaseEvent("InvoiceApplicationApproved", applicationID, "InvoiceApplication"),
		ApplicationID: applicationID,
		UserID:        userID,
		Amount:        amount,
		ReceivingEmail: receivingEmail,
		ApprovedAt:    time.Now(),
	}
	return event
}

// GetPayload 获取事件载荷
func (e *InvoiceApplicationApprovedEvent) GetPayload() interface{} {
	return e
}

// InvoiceApplicationRejectedEvent 发票申请拒绝事件
type InvoiceApplicationRejectedEvent struct {
	BaseEvent
	ApplicationID string    `json:"application_id"`
	UserID        string    `json:"user_id"`
	Reason        string    `json:"reason"`
	ReceivingEmail string   `json:"receiving_email"`
	RejectedAt    time.Time `json:"rejected_at"`
}

// NewInvoiceApplicationRejectedEvent 创建发票申请拒绝事件
func NewInvoiceApplicationRejectedEvent(applicationID, userID, reason, receivingEmail string) *InvoiceApplicationRejectedEvent {
	event := &InvoiceApplicationRejectedEvent{
		BaseEvent:     NewBaseEvent("InvoiceApplicationRejected", applicationID, "InvoiceApplication"),
		ApplicationID: applicationID,
		UserID:        userID,
		Reason:        reason,
		ReceivingEmail: receivingEmail,
		RejectedAt:    time.Now(),
	}
	return event
}

// GetPayload 获取事件载荷
func (e *InvoiceApplicationRejectedEvent) GetPayload() interface{} {
	return e
}

// InvoiceFileUploadedEvent 发票文件上传事件
type InvoiceFileUploadedEvent struct {
	BaseEvent
	InvoiceID      string                    `json:"invoice_id"`
	UserID         string                    `json:"user_id"`
	FileID         string                    `json:"file_id"`
	FileName       string                    `json:"file_name"`
	FileURL        string                    `json:"file_url"`
	ReceivingEmail string                    `json:"receiving_email"`
	CompanyName    string                    `json:"company_name"`
	Amount         decimal.Decimal           `json:"amount"`
	InvoiceType    value_objects.InvoiceType `json:"invoice_type"`
	UploadedAt     time.Time                 `json:"uploaded_at"`
}

// NewInvoiceFileUploadedEvent 创建发票文件上传事件
func NewInvoiceFileUploadedEvent(invoiceID, userID, fileID, fileName, fileURL, receivingEmail, companyName string, amount decimal.Decimal, invoiceType value_objects.InvoiceType) *InvoiceFileUploadedEvent {
	event := &InvoiceFileUploadedEvent{
		BaseEvent:     NewBaseEvent("InvoiceFileUploaded", invoiceID, "InvoiceApplication"),
		InvoiceID:     invoiceID,
		UserID:        userID,
		FileID:        fileID,
		FileName:      fileName,
		FileURL:       fileURL,
		ReceivingEmail: receivingEmail,
		CompanyName:   companyName,
		Amount:        amount,
		InvoiceType:   invoiceType,
		UploadedAt:    time.Now(),
	}
	return event
}

// GetPayload 获取事件载荷
func (e *InvoiceFileUploadedEvent) GetPayload() interface{} {
	return e
}